1
JEE Main 2013 (Offline)
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
For gaseous state, if most probable speed is denoted by C*, average speed by $$\mathop C\limits^{\_\_} $$ and mean square speed by C, then for a large number of molecules the ratios of these speeds are:
A
C*: $$\mathop C\limits^{\_\_} $$ : C = 1.128 : 1.225 : 1
B
C*: $$\mathop C\limits^{\_\_} $$ : C = 1.225 : 1.128 : 1
C
C*: $$\mathop C\limits^{\_\_} $$ : C = 1 : 1.225 : 1.128
D
C*: $$\mathop C\limits^{\_\_} $$ : C = 1 : 1.128 : 1.225
2
JEE Main 2013 (Offline)
MCQ (Single Correct Answer)
+4
-1
A piston filled with 0.04 mol of an ideal gas expands reversibly from 50.0 mL to 375 mL at a constant temperature of 37.0oC. As it does so, it absorbs 208J of heat. The values of q and w for the process will be :
(R = 8.314 J/mol K) ( l n 7.5 = 2.01)
A
q = – 208 J, w = – 208 J
B
q = – 208 J, w = + 208 J
C
q = + 208 J, w = + 208 J
D
q = + 208 J, w = – 208 J
3
JEE Main 2013 (Offline)
MCQ (Single Correct Answer)
+4
-1
How many litres of water must be added to 1 litre of an aqueous solution of HCl with a pH of 1 to create an aqueous solution with pH of 2?
A
0.1 L
B
0.9 L
C
2.0 L
D
9.0 L
4
JEE Main 2013 (Offline)
MCQ (Single Correct Answer)
+4
-1
A solution of (–$$l$$) – chloro –1 – phenylethane in toluene racemises slowly in the presence of a small amount of SbCl5, due to the formation of :
A
carbene
B
carbocation
C
free radical
D
carbanion
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